2x Samsung 1GB PC3-8500S Laptop RAM Sticks (Used) - G-Skill 4GB DDR3-1066 Laptop RAM Stick (Used). Crucial 2GB DDR3-1066 Laptop RAM Stick (Used). Last I knew all components listed function, but some of the memory sticks or fans may have had a fault, all were replaced for better upgrades, not for issues as far as I can remember.